Galaxy S3 Android 4.1.2 I9300XXELLA Firmware Update and Root

The new version of  Android 4.1.2 firmware is now available for download and the firmware info is as below:

PDA: I9300XXELLA
CSC: I9300OXAELLA
Version: 4.1.2
Date: 2012-12-24
Regions: Austria, Belgium, France, Germany, Hungary, Italy, Spain, United Kingdom

Here is the step by step tutorial how to download, flash and root the  galaxy S3 latest firmware I9300XXELLA:

Note: Flash or modified Galaxy S3 firmware will void the phone warranty. Method below is only for your reference and only for the international Galaxy S3 GTi9300. Try it on your own risk. Before proceed to the step tutorial below, You can refer to the Galaxy S3 Hints and Tips for more info.

Step 1. You need Samsung Diver to enable your PC able detect and connect to your Galaxy S3. So you can Download Samsung Galaxy Driver (Link) or Download and install Samsung Kies on your PC. Restart your PC after installation complete.

Step 2. Download (Link)  the Galaxy S3 I9300XXELLA firmware (I9300XXELLA_I9300OXAELLA_BTU.zip ) and then Extract the file  and now you will get I9300XXELLA_I9300OXAELLA_BTU.tar file.

Step 3.Go Setting >Developers option to enable USB Debugging on your Galaxy S3and then Power off your  Galaxy Note 2.

Step 4.Press your Galaxy volume Down+ Power Button + Home Button to enter Downloading Mode.

Step 5.  Open Odin (download Link) on PC, then connect your Galaxy S3 to PC via USB connect USB.

Step 6.  Make sure Odin Detect your Galaxy S3 (How to know).

Step 7.  Press Odin PDA, then select the  downloaded firmware ( I9300XXELLA_I9300OXAELLA_BTU.tar).

Step 8.Now click Odin Start button  to Flash the firmware into your galaxy S3. Don’t unplug Galaxy S3 connection from computer during the process flashing Android 4.1.2 firmware.

Step 9.That all! Your Phone will reboot once the firmware complete flash into your Galaxy S3. That’s all Enjoys!

If you want to root your Galaxy S3 , then below is the tutorial on how to Root galaxy S3 9300XXELLA firmware :

Step 1. You need Samsung Diver to enable your PC able detect and connect to your Galaxy S3. So you can Download Samsung Galaxy Driver (Link) or Downloadand install Samsung Kies on your PC. Restart your PC after installation complete.

Step 2. Download (Link)  the Galaxy S3 CF Auto Root(CF-Auto-Root-m0-m0du-gti9300t.zip) and then Extract the file  and now you will get ( CF-Auto-Root-m0-m0du-gti9300t.tar file).

Step 3.Go Setting >Developers option to enable USB Debugging on your Galaxy S3 and then Power off your  Galaxy S3.

Step 4.Press your Galaxy volume Down+ Power Button + Home Button to enter Downloading Mode.

Step 5.  Open Odin (download Link) on PC, then connect your Galaxy S3 to PC via USB connect USB.

Step 6.  Make sure Odin Detect your Galaxy S3 (How to know).

Step 7.  Press Odin PDA, then select the  downloaded firmware (CF-Auto-Root-m0-m0du-gti9300t .tar).

Step 8.Now click Odin Start button  to Flash the CF Auto Root Kernel into your galaxy S3. Don’t unplug Galaxy S3 connection from computer during the process flashing Android CF Auto Root Kernel.

Step 9.That all! Your Phone will reboot once the Root Kernel complete flash into your Galaxy S3.

That’s all Enjoys! Rooting Galaxy S3 will increase the system binary counter. You can check the system binary counter. on the downloading Mode (Press Home Button + Power Button + Volume Down Button). So, you need to reset the system binary counter to avoid your galaxy S3 waranty being void.  Then you can refer here on how to reset the Galaxy S3 flash counter.